Abstract: Spectral representation of waveform distor-tions has been of great interest in power systems for many years since the disturbing loads generate a wide spectrum of components which deteriorate the quality of power supply. When spectral components are time-varying in amplitude and/or in frequency – such as in presence of arc furnaces and adjustable speed drives - high resolution methods should be applied due to their capability of cap-ture these changes in time. In this paper the Prony and ESPRIT high-resolution methods are used to analyse simulated non-stationary waveforms in a supply system of a DC arc furnace. The analysis has been completed before and after the inclusion in the system of several compensa-tion devices (STATCOM, Active Filter, Passive Filter and a hybrid of STATCOM and Active Filter). The main con-clusion of the paper is that Prony and ESPRIT methods are useful tools also for the control system design; in fact, they allow capturing time variations of spectra compo-nents better than most usual techniques such as Fourier-based methods.

Keyword(s): DC Arc Furnaces ; STATCOM ; Active Filters ; Non-stationary Signal Analysis ; Prony Method ; ESPRIT
Note: 15th Power Systems Computation Conference. PSCC. Proceedings. Liege, 22-26 August 2005, 7 p.


Fulltext : http://zet10.ipee.pwr.wroc.pl/record/13/files/

Cited by: try citation search for ENY-ARTICLE-2008-011; RZ I07/05/I-026

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